C1111121111331311211331333133313331333133313231333133313331311222233121   >>    C111112111133131121133133313331333133313331323133313331333131122223312   <<    C1111121111331311211331333133313331333133313231333133313331311222233123   >>      C1111121111331311211331333133313331333133313231333133313331311222233122   >>